Lacy & Sabby [1]} obtained and measured RVs from 27 high-resolution échelle spectra of ZZ UMa. They combined these with the photometric results from Clement et al. [2]} to obtain the first determination of the masses and radii of the component stars. Imbert [3]} presented a spectroscopic orbit of ZZ UMa based on 49 spectra from the Coravel and Élodie instruments. The resulting masses and radii are in reasonable agreement with those from Lacy & Sabby.
